rssoft::EvaluationValues Class Reference

Evaluation points of encoding polynomial and symbol values. Following the format of Reliability and Multiplicity matrices: More...

#include <EvaluationValues.h>

Collaboration diagram for rssoft::EvaluationValues:

List of all members.

Public Member Functions
	EvaluationValues (const gf::GFq &_gf)
	EvaluationValues (const gf::GFq &_gf, const std::vector< gf::GFq_Element > &_x_values, const std::vector< gf::GFq_Element > &_y_values)
	~EvaluationValues ()
const std::vector < gf::GFq_Element > &	get_x_values () const
const std::vector < gf::GFq_Element > &	get_evaluation_points () const
const std::vector < gf::GFq_Element > &	get_y_values () const
const std::vector < gf::GFq_Element > &	get_symbols () const
Protected Attributes
const gf::GFq &	gf
	Galois Field being used.
std::vector< gf::GFq_Element >	x_values
	successive evaluation points in GFq of the encoding polynomial
std::vector< gf::GFq_Element >	y_values
	successive symbol values of the corresponding elements in GFq

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Detailed Description

Evaluation points of encoding polynomial and symbol values. Following the format of Reliability and Multiplicity matrices:

• Horizontal, column or X values represent the successive evaluation points in GFq of the encoding polynomial
• Vertical, row or Y values represent the successive symbol values of the corresponding elements in GFq

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Constructor & Destructor Documentation

rssoft::EvaluationValues::EvaluationValues

(

const gf::GFq &

_gf

)

Default constructor X values are the successive powers of alpha Y values are 0 followed by the successive powers of alpha

Parameters:

gf	Reference to the Galois Field being used

                                                   :
        gf(_gf)
{
        // default X interpolation values initialized as increasing powers of alpha starting at a^0 = 1
        // default Y interpolation values initialized as the increasing natural order of symbols

        y_values.push_back(gf::GFq_Element(gf, 0));

        for (unsigned int i=0; i < gf.size(); i++)
        {
                x_values.push_back(gf::GFq_Element(gf, gf.alpha(i)));
                y_values.push_back(gf::GFq_Element(gf, i+1));
        }
}

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rssoft::EvaluationValues::EvaluationValues	(	const gf::GFq &	_gf,
		const std::vector< gf::GFq_Element > &	_x_values,
		const std::vector< gf::GFq_Element > &	_y_values
	)

Constructor given X and Y values. It is programmer's responsibility to enter values correctly

Parameters:

gf	Reference to the Galois Field being used
_x_values	Successive evaluation points in GFq of the encoding polynomial
_y_values	Successive symbol values of the corresponding elements in GFq

                                                                                                                                         :
        gf(_gf),
        x_values(_x_values),
        y_values(_y_values)
{
        if (x_values.size() > gf.size())
        {
                throw RSSoft_Exception("number of evaluation points cannot be more than the number of non null elements in the field");
        }
        else if (y_values.size() > gf.size()+1)
        {
                throw RSSoft_Exception("number of symbols cannot be more than the number of elements in the field");
        }
}

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rssoft::EvaluationValues::~EvaluationValues

(

)

Destructor

{}

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Member Function Documentation

const std::vector<gf::GFq_Element>& rssoft::EvaluationValues::get_evaluation_points

(

)

const [inline]

        {
                return x_values;
        }

const std::vector<gf::GFq_Element>& rssoft::EvaluationValues::get_symbols

(

)

const [inline]

        {
                return y_values;
        }

const std::vector<gf::GFq_Element>& rssoft::EvaluationValues::get_x_values

(

)

const [inline]

        {
                return x_values;
        }

const std::vector<gf::GFq_Element>& rssoft::EvaluationValues::get_y_values

(

)

const [inline]

        {
                return y_values;
        }

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Member Data Documentation

const gf::GFq& rssoft::EvaluationValues::gf [protected]

Galois Field being used.

std::vector<gf::GFq_Element> rssoft::EvaluationValues::x_values [protected]

successive evaluation points in GFq of the encoding polynomial

std::vector<gf::GFq_Element> rssoft::EvaluationValues::y_values [protected]

successive symbol values of the corresponding elements in GFq

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The documentation for this class was generated from the following files:

• /shared/development/google_code/rssoft/library/lib/EvaluationValues.h
• /shared/development/google_code/rssoft/library/lib/EvaluationValues.cpp